Peer Partitioning

1. A system in a blockchain network, the system comprising: a memory storing one or more instructions; and a processor that when executing the one or more instructions is configured to: receive a discovery query containing an endorsement policy from a user node in the blockchain network; generate cryptographic sortition parameters based on the endorsement policy; send the cryptographic sortition parameters to a plurality of endorser nodes in the blockchain network; collect sortition labels from the plurality of the endorser nodes, the sortition labels being generated based on the cryptographic sortition parameters; determine, based on the sortition labels, a set of the endorser nodes, from the plurality of the endorser nodes, that qualify the endorsement policy; and provide identifiers of the set of the endorser nodes to the user node for an endorsement of a user transaction proposal.

2. The system of claim 1 , wherein the sortition labels reflect the workloads and the stakes of the plurality of the endorser nodes.

3. The system of claim 2 , wherein the processor is further configured to: determine the set of the endorser nodes in proportion to the stakes and the workloads of the endorser nodes.

4. The system of claim 1 , wherein the processor is further configured to: determine a set of the endorser nodes from the plurality of the endorser nodes based on sortition tuples (hash, π, s, w) received from the plurality of the endorser nodes, wherein π is a proof, s is the stake and w is the workload of the endorser nodes.

5. The system of claim 1 , wherein the processor is further configured to: pre-select a subset of the endorser nodes from the plurality of the endorser nodes based on a stake threshold and on a workload threshold.

6. The system of claim 5 , wherein the processor is further configured to: pre-select the subset of the endorser nodes that have the stakes that exceed or equal to the stake threshold.

7. The system of claim 5 , wherein the processor is further configured to: pre-select the subset of the endorser nodes that have the workloads that are below or equal to the workload threshold.

8. A method, comprising: receiving, by the service discovery node, a discovery query containing an endorsement policy from a user node in the blockchain network; generating, by the service discovery node, cryptographic sortition parameters based on the endorsement policy; sending, by the service discovery node, the cryptographic sortition parameters to a plurality of endorser nodes in the blockchain network; collecting, by the service discovery node, sortition labels from the plurality of the endorser nodes, the sortition labels being generated based on the cryptographic sortition parameters; determining, based on the sortition labels, a set of the endorser nodes, from the plurality of the endorser nodes, that qualify the endorsement policy; and providing, by the service discovery node, identifiers of the set of the endorser nodes to the user node for an endorsement of a user transaction proposal.

9. The method of claim 8 , wherein the sortition labels reflect the workloads and the stakes of the plurality of the endorser nodes.

10. The method of claim 9 , further comprising: determining the set of the endorser nodes in proportion to the stakes and the workloads of the endorser nodes.

11. The method of claim 8 , further comprising: determining a set of the endorser nodes from the plurality of the endorser nodes based on sortition tuples (hash, π, s, w) received from the plurality of the endorser nodes, wherein π is a proof, s is the stake and w is the workload of the endorser nodes.

12. The method of claim 8 , further comprising: pre-selecting a subset of the endorser nodes from the plurality of the endorser nodes based on a stake threshold and on a workload threshold.

13. The method of claim 12 , further comprising: pre-selecting the subset of the endorser nodes that have the stakes that exceed the stake threshold.

14. The method of claim 12 , further comprising: pre-selecting the subset of the endorser nodes that have the workloads that are below the workload threshold.

15. A non-transitory computer readable medium comprising instructions that when executed by a processor, cause the processor to perform: connecting to a blockchain configured to store workloads and stakes of a plurality of endorser nodes; receiving a discovery query containing an endorsement policy from a user node in the blockchain network; generating cryptographic sortition parameters based on the endorsement policy; sending the cryptographic sortition parameters to a plurality of endorser nodes in the blockchain network; collecting sortition labels from the plurality of the endorser nodes, the sortition labels generated based on the sortition parameters; determining a set of the endorser nodes, from the plurality of the endorser nodes, that qualify the endorsement policy; and providing identifiers of the set of the endorser nodes to the user node for an endorsement of a user transaction proposal.

16. The non-transitory computer readable medium of claim 15 , wherein the one or more instructions further cause the processor to perform: determining the set of the endorser nodes in proportion to the stakes and the workloads of the endorser nodes.

17. The non-transitory computer readable medium of claim 15 , wherein the one or more instructions further cause the processor to perform: determining a set of the endorser nodes from the plurality of the endorser nodes based on sortition tuples (hash, π, s, w) received from the plurality of the endorser nodes, wherein π is a proof, s is the stake and w is the workload of the endorser nodes.

18. The non-transitory computer readable medium of claim 15 , wherein the one or more instructions further cause the processor to perform: pre-selecting a subset of the endorser nodes from the plurality of the endorser nodes based on a stake threshold and on a workload threshold.

19. The non-transitory computer readable medium of claim 18 , wherein the one or more instructions further cause the processor to perform: pre-selecting the subset of the endorser nodes that have the stakes that exceed the stake threshold.

20. The non-transitory computer readable medium of claim 18 , wherein the one or more instructions further cause the processor to perform: pre-selecting the subset of the endorser nodes that have the workloads that are below the workload threshold.